1.  Mr. RAJ’s Computer Repair I & II: A+ ESSENTIALS Contact: 301.802.9066 Email: Rajeev8989@live.com Online Exams: www.Classmarker.com Designed and prepared for Mr. Raj Students Only at Career Technical Institute [Confidential] Note: Do not copy or distribute without Mr. Raj’s Authorization! Basics & Ports Your Computer only understand two things: 0 and 1 Everything inside the PC is 0 and 1 You type character “A” on the keyboard…Before it shows up on the monitor, it is converted to BINARY Expression: 01100011010010 First four #’s tell the computer the group: 0110 (Character Group) Second group of numbers: 0011010010 (Character A)…This group tells the processor what character it is. 4 Functions of the PC: 1.Input 2.Processing 3.Output 4.Storage 1

2.  Mr. RAJ’s Computer Repair I & II: A+ ESSENTIALS Contact: 301.802.9066 Email: Rajeev8989@live.com Online Exams: www.Classmarker.com Designed and prepared for Mr. Raj Students Only at Career Technical Institute [Confidential] Note: Do not copy or distribute without Mr. Raj’s Authorization! Binary Numbers Remember these are the only numbers that your computer understands! Simple way to understand Binary: BinaryDecimal 0 1 1 0 0 0 1 1 == 99 We read these numbers from right to left. Each Binary number (Base 2 )represents a switch (128, 64, 32, 16, 8, 4, 2, 1) = 8 bits 0 1 1 0 0 0 1 1 * * * * 128, 64, 32, 16, 8, 4, 2, 1 0 + 64 +32+ 0+0+0+2+1 = 99 Calculate: 1010 = ?? 2

3.  Mr. RAJ’s Computer Repair I & II: A+ ESSENTIALS Contact: 301.802.9066 Email: Rajeev8989@live.com Online Exams: www.Classmarker.com Designed and prepared for Mr. Raj Students Only at Career Technical Institute [Confidential] Note: Do not copy or distribute without Mr. Raj’s Authorization! ESD Electro Static Discharge (The Passing of Static Electrical Charge) It happens when two objects with different amounts of static electricity come into contact with one another It occurs more often in Dry, Cool environments Example: Ways to Avoid: 1.Antistatic Wrist Strap 2.Antistatic Mat 3.Antistatic Bag 4.Workaround if you don’t have above three: a.Touch the power supply frequently b.Always unplug the PC before working on it Easy way to remember ESD ESD == B.A.D. 3 Guaranteed to be on the EXAM

4.  Mr. RAJ’s Computer Repair I & II: A+ ESSENTIALS Contact: 301.802.9066 Email: Rajeev8989@live.com Online Exams: www.Classmarker.com Designed and prepared for Mr. Raj Students Only at Career Technical Institute [Confidential] Note: Do not copy or distribute without Mr. Raj’s Authorization! ToolKit Philip Head Screwdriver (s) Star Head Torx Wrenches (8 side star) Flat Head Screwdriver(s) IC Extractor 3 Prong Parts Retriever Tweezers 4

5.  Mr. RAJ’s Computer Repair I & II: A+ ESSENTIALS Contact: 301.802.9066 Email: Rajeev8989@live.com Online Exams: www.Classmarker.com Designed and prepared for Mr. Raj Students Only at Career Technical Institute [Confidential] Note: Do not copy or distribute without Mr. Raj’s Authorization! 5

6. External Connections What is a PLUG? It is a part with something that is inserted into something. What is a Port? It is what a plug is inserted into. What is a Jack? It is another word for Port. What is a connector? It is a generic term for plug or port. 6

7.  Mr. RAJ’s Computer Repair I & II: A+ ESSENTIALS Contact: 301.802.9066 Email: Rajeev8989@live.com Online Exams: www.Classmarker.com Designed and prepared for Mr. Raj Students Only at Career Technical Institute [Confidential] Note: Do not copy or distribute without Mr. Raj’s Authorization! External Connections MONITOR CONNECTIONS Vga Svideo Dvi Hdmi 7

8.  Mr. RAJ’s Computer Repair I & II: A+ ESSENTIALS Contact: 301.802.9066 Email: Rajeev8989@live.com Online Exams: www.Classmarker.com Designed and prepared for Mr. Raj Students Only at Career Technical Institute [Confidential] Note: Do not copy or distribute without Mr. Raj’s Authorization! External Connections (Monitor Connection:VGA) 8

9.  Mr. RAJ’s Computer Repair I & II: A+ ESSENTIALS Contact: 301.802.9066 Email: Rajeev8989@live.com Online Exams: www.Classmarker.com Designed and prepared for Mr. Raj Students Only at Career Technical Institute [Confidential] Note: Do not copy or distribute without Mr. Raj’s Authorization! External Connections (Monitor Connection: S-Video) 9

10.  Mr. RAJ’s Computer Repair I & II: A+ ESSENTIALS Contact: 301.802.9066 Email: Rajeev8989@live.com Online Exams: www.Classmarker.com Designed and prepared for Mr. Raj Students Only at Career Technical Institute [Confidential] Note: Do not copy or distribute without Mr. Raj’s Authorization! External Connections (Monitor Connection: DVI) 10

11.  Mr. RAJ’s Computer Repair I & II: A+ ESSENTIALS Contact: 301.802.9066 Email: Rajeev8989@live.com Online Exams: www.Classmarker.com Designed and prepared for Mr. Raj Students Only at Career Technical Institute [Confidential] Note: Do not copy or distribute without Mr. Raj’s Authorization! External Connections Monitor Connections 11